Research & reports

Isaac Asirifi, Korbinian Kaetzl, Steffen Werner, Courage Kosi Setsoafia Saba, Felix K. Abagale, Philip Amoah, Bernd Marschner · Journal of Environmental Quality · Ghana

A field experiment in northern Ghana assessed health risks from pathogen and heavy metal contamination in urban agriculture, evaluating rice husk biochar, N-P-K fertilizer, and their combinations with untreated wastewater or tap water irrigation. While heavy metals in irrigation water and soil were below FAO/WHO standards, wastewater irrigation caused significant E. coli, fecal coliform, and helminth egg contamination on red amaranth vegetables and in soil. Biochar application did not affect bacterial contamination.

Zerrin Mercan, Büşra BİLİR, Nilüfer Darıca · Cukurova University Faculty of Education Journal · Turkey

This qualitative study examined the gardens of 27 preschool education institutions in Gaziantep province as physical learning environments. Findings showed that while physical and social areas existed in school gardens, they required qualitative support. Silent areas were very limited and located within vocal areas, and creative and sensory areas were not present in the school gardens.

Jessica Cuevas-Castilleja, Armando Martínez-Luz, Marcelo Adán López-Arzate, Itzel Arlette Ramírez-García, Gustavo Mora‐Aguilera, Norma Ávila-Alistac · Revista mexicana de fitopatología(en línea)/Revista mexicana de fitopatología · Mexico (Mexico City)

This study investigated the impact of COVID-19 on productive activities and the level of Integrated Pest Management (IPM) application among 108 urban agriculture farmers and extensionists in six areas of Mexico City. A digital survey in 2020 revealed that the sanitary emergency reduced extension services, though they continued with digital technologies. During the peak of COVID-19, 14% of farmers declined to sow the summer-fall season, and up to 75% reported 20% losses due to the epidemic. The main pest control strategies were mechanical (67%) and chemical (52%), indicating an intuitive understanding of IPM benefits despite farmers being unaware of its principles.

Enrico Buscaroli, Ilaria Braschi, Chiara Cirillo, Agnès Fargue‐Lelièvre, Giuseppe Carlo Modarelli, Giuseppina Pennisi, Isabella Righini, Kathrin Specht, Francesco Orsini · Food Control · Global

This paper addresses the potential underestimation of food safety risks in urban agriculture (UA), which can lead to regulatory gaps, despite positive perceptions of UA. It reviews literature on UA food safety assessments, identifying indicators and developing a framework for evaluating food safety risks in UA initiatives. The framework uses business surveys and food analyses to calculate a food safety index for UA businesses and city regions.

Kate Lohrey, Patricia Talarczyk · Journal of Student Research · Global

An experiment over six weeks investigated the impact of traffic noise pollution on plant growth in urban community gardens. Plants exposed to traffic noise showed significantly reduced average height (65.6 mm vs 104.2 mm) and weight (0.85 g vs 1.31 g) compared to those in natural noise conditions. The study found a statistically significant deteriorating effect of traffic noise on plant growth.

Shwan Mohammed, P. K. Nyade, Mohamad Abdulhamid, I. O. A. Hodgson · Water Science · Ghana (Accra)

This study assessed urban water quality parameters of the Nima Creek in Southeastern Accra, Ghana, sampling water from six locations. The results showed high enrichment of nutrients (ammonia, nitrate, phosphate) and elevated levels of BOD, COD, and grease at sites receiving solid and liquid wastes. Physicochemical parameters like conductivity, TSS, and TDS also exhibited elevated values, indicating significant contamination that poses challenges for sustainable urban agriculture.

Hoda Fakour, Shang‐Lien Lo, Nathan Thadeo Yoashi, Angelbetter Marselian Massao, Nelson Naboth Lema, Fezile Bethusile Mkhontfo, Patrick Chris Jomalema, Nasra Shabani Jumanne, Bright Hubert Mbuya, James Travor Mtweve, Moslem Imani · Agriculture · Taiwan (Tainan)

A study in Tainan city farms, Taiwan, quantified and analyzed microplastics (MPs) in farmland soils. MPs were found in all soil samples at depths ranging from 12–117 items/m2. Farms adjacent to suburban roads had approximately three times more MPs than enclosed farms. Fragment and fibers were the main forms, with low-density polyethylene being the dominant polymer, originating from historical land use, plastic mulch, and fruit protection foams.

Camille Frazier · Hong Kong University Press eBooks · India (Bengaluru)

This paper examines motivations for organic terrace gardening among middle-class individuals in Bengaluru, India, who grow food for home consumption. Gardeners respond to worsening health and environmental conditions, but class and caste inequalities limit their engagement with a broader community of urban food producers. These inequalities restrict the transformative potential of organic terrace gardening as an intervention, indicating a critical finding regarding equity.

James J. Connolly, Isabelle Anguelovski · Frontiers in Ecology and Evolution · United States

This study used state sequence analysis to examine the historical trend of greening (including parks and community gardens) from 1975 to 2014 in nine U.S. cities, in relation to concentrations of white and non-white residents. Findings revealed that the relationship between greening and race/ethnicity varied by city-level growth trajectory. Cities with continuous high growth showed the strongest link between increased greening and whiter populations, while non-white areas in cities with contraction or punctuated growth exhibited uniformly low levels of greening, mostly in recent years.

Elijalma Augusto Beserra, Vivianni Marques Leite dos Santos, Eva Mônica Sarmento da Silva, Lúcia Marisy Souza Ribeiro de Oliveira, Hesler Piedade Caffé Filho · ID on line REVISTA DE PSICOLOGIA · Brazil

This descriptive, qualitative, and quantitative research, conducted from September to December 2021, investigated how the community garden of the Coelho Atikum Jurema Community in Brazil was affected by Covid-19. The study identified a series of adversities faced by the community in adapting to the market changes resulting from Covid-19 social interaction rules. These rules directly impacted the community's marketing techniques, posing challenges to economic viability.

Petra Hencelová, František Križan, Kristína Bilková, Michala Sládeková Madajová · Norsk Geografisk Tidsskrift - Norwegian Journal of Geography · Europe

This study aimed to identify the impact of visit frequency to community gardens in Slovakia on members' perception of membership importance, satisfaction with community relations, perceived improvement in social relations, and influence on quality of life. A mixed-methods approach, including a questionnaire survey and semi-structured interviews, was used. The analysis did not confirm a dependence between visit frequency and the gardens' impact on members' communities, and found no statistical relationships between the variables in the analyzed data set. However, members positively rated relationships within those communities.

Tenri Ulfa, Nurlita Pertiwi · UNM Environmental Journals · Indonesia (Makassar)

This descriptive quantitative and correlational study of 50 respondents in Makassar City examined urban farming behavior and influencing factors. While respondents generally had high environmental knowledge, their environmental attitudes were moderate. 23 respondents with low urban farming activities cited time constraints as a difficulty, despite a significant, strong, and unidirectional relationship found between knowledge, attitudes, and behavior.

Fabio Amato, Lucia Simonetti · Journal of urban regeneration and renewal · Italy (Naples)

This paper focuses on the social urban garden in the Ponticelli neighborhood on the eastern outskirts of Naples, Italy, an area facing significant social and cultural problems including high unemployment and crime rates. The urban garden demonstrates how social cohesion can be built through urban agriculture and contribute to sustainability. However, the initiative risks remaining isolated and providing limited benefit to regional environmental sustainability efforts if not framed within an overall metropolitan strategy.

Sabina Rossini Oliva, Rafael López Núñez · Agronomy · Spain

This study investigated potential toxic element contamination in food and soils from urban and rural gardens in Seville, Spain, including urban gardens in a mining area. Soils from mining gardens were the most contaminated. While arsenic, cadmium, and lead concentrations in studied vegetables did not exceed legal maximum levels, high levels of barium (up to 42 mg kg−1) and zinc (up to 123 mg kg−1) were found in leafy green vegetables like chard and lettuce, indicating a need for further study on associated human health risks.

Nazir Muhammad Abdullahi, Ernest Chukwusoro IGWE, Munir Abba Dandago, Naima Umar · FUDMA Journal of Sciences · Global

This review discusses heavy metal contamination in food crops, identifying wastewater irrigation, agrochemical abuse, contaminated fields, atmospheric deposition, and unethical mining as primary sources. Agricultural soil in urban and peri-urban areas is heavily contaminated due to anthropogenic activities, with wastewater irrigation intensifying this contamination. Heavy metals are transferred to food crops during production and subsequently to humans upon consumption, posing a detrimental risk.

Marta Crispo, Miriam C. Dobson, Roscoe S. Blevins, William Meredith, Janice A. Lake, Jill L. Edmondson · Environmental Pollution · United Kingdom

Heavy metal (HM) and metalloid concentrations were assessed in 200 urban horticultural soils across ten UK cities. HM were found to be widespread, with most concentrations below UK soil screening values (C4SLs). However, 83% of lead (Pb) concentrations exceeded C4SLs, which is a significant concern. Bioavailable HM concentrations represented a small fraction (0.01–1.8%) of total concentrations, and black carbon (BC) and organic carbon (OC) were suggested to contribute to HM immobilization.

Seema Purushothaman, Sheetal Patil, Raghvendra S. Vanjari, A. R. Shwetha · · India (Bengaluru)

A participatory assessment in Byramangala, Bengaluru, explored farmers' perspectives on using wastewater (domestic sewage with industrial effluents) for irrigation. The study found that farmers were adapting to a heavily polluted environment, which resulted in restricted crop choices, lower produce prices, health impacts, and socio-cultural consequences. Despite concerns about water quality, farmers prioritized health-imparting agriculture and were keen to continue farming, but their preference for treated wastewater was overshadowed by its potential diversion for urban use.

Mariana Portilho, Camila Rodrigues, Annelise Caetano Fraga Fernandez · Cidades, comunidades e território/Cidades comunidades e territórios · Brazil (Rio de Janeiro)

This study describes the formation of Arranjo Local da Penha, a community network created in 2016 in Rio de Janeiro's Penha favela complex, focused on urban agriculture and led by women. Through fieldwork and participant observation, the study analyzed themes of women and agroecology, health, and healthy eating. The network promoted women's empowerment and access to healthy food, but faced limits in the mobilization and development of urban agriculture.

K. K. Dey, Maria Velez-Climent, P. Soria, Özgur Batuman, Vessela Mavrodieva, Guo Wei, Jun Zhou, Scott Adkins, John D. McVay · New Disease Reports · United States (Florida)

In October 2019, Tomato brown rugose fruit virus (ToBRFV) was detected in six of eight symptomatic tomato plants from a 1.6 ha community garden in Alachua County, Florida. The plants also showed symptoms of Tomato yellow leaf curl virus (TYLCV), with three samples testing positive for TYLCV. This marks the first report of ToBRFV infecting tomatoes in Florida, USA.

Camille Dumat · Aspects in Mining & Mineral Science · Global

This paper discusses the negative environmental and health impacts of mining, such as air and soil pollution, despite its socio-economic benefits. It highlights that urban agriculture, particularly in areas near former mining sites, faces challenges regarding soil quality and the production of unpolluted vegetables due to public concerns about contamination.

Ahmed Khadra · IGI Global eBooks · Global

This chapter examines the health effects of climate change, specifically focusing on the global issue of fecal peril caused by intestinal parasites. It suggests that water shortages, driven by climate change, increase pressure on water resources, leading to greater use of urban wastewater for irrigation in urban agriculture. Unsafe management and inappropriate wastewater use are likely to exacerbate the transmission of infectious diseases, including those caused by intestinal protozoa and helminths.

Boglarka Z. Gulyas, Jill L. Edmondson · Sustainability · Global North

A systematic review of literature on urban agriculture (UA) in the Global North identified factors determining its success in enhancing city resilience and challenges limiting it. UA's success in increasing city resilience was defined as dependent on five factors: institutional and public support, a sufficient knowledge base, communication and collaboration among actors, and resourcefulness in efficient space and resource use. However, comprehensive assessments of UA's potential are still lacking, suggesting challenges in its effective implementation.

ELIZABETE CRISTINA RIBEIRO SILVA JARDIM · Editora Realize eBooks · Brazil

This research analyzed Brazilian school garden experiences across three document sets, identifying procedures and resources incongruent with stated counter-hegemonic objectives. The study found structural inadequacies for the school space and omissions regarding the protection and safety of farmers and students during activities. It recommends adjustments to location, spatial organization, and material resources for school gardens to ensure the health of food producers.

Iwona Makuch-Pietraś, A. Wójcikowska-Kapusta · Land · Poland

This research investigated the distribution, bioavailability, and total forms of zinc (Zn) in soils from domestic and family allotment gardens across six cities in south-eastern Poland. It found that horticultural treatments had a greater impact on sandy soils, and higher Zn contents were present in humus horizons. High values of concentration and Igeo indices indicated significant Zn pollution in these soils, with bioavailable zinc forms being notably high.

Francis Mwanza, Erick Komba, Dominic Kambarage · International Journal of Microbiology · Tanzania (Dar es Salaam)

This study in Dar es Salaam, Tanzania, investigated the occurrence, antimicrobial resistance, and genetic relatedness of E. coli isolates from 156 samples of manure, vegetables, and fish. Of these, 36 samples (23.1%) were positive for E. coli, yielding 48 isolates. A significant finding was that 25 (52.1%) of these isolates were resistant to at least one antimicrobial agent, and 12 (48.0%) showed multidrug resistance, indicating a potential microbial health risk to humans through contamination.